Controlling device for filters, &amp;c.



No. 800,392. PATENTED SEPT. 26, 1905. G. L. PARMELEH. CONTROLLING DBVIOBFOR FILTERS, 8w,

APPLICATION FILED 1&113. 1906.

o v v A 42/.)

CHARLES LESTER PARMELEE, ORANGE, NEW JERSEY.

CONTROLLING DEVICE FOR FILTERS. ac.

Specification of Letters,Patent.

Patented. Sept. 26, 1905.

Application filed January 3, 1905. Serial No. 239,301.

To all whom it may concern.-

Be it known that I, GHARLns Lnsrrnn PARME- LEE, a citizen of the United States. and a resieither with a'liquid or a gas, or both.

'dent of Orange, in the county of Essex and State'of New Jersey, have invented certain new and useful Improvements in Controlling Devices for Filters, &c., of which the following is a specification.

My invention relates to devices for controlling the rate of discharge or supply of liquids, and more particularly to that class thereof designed for employment in connection with filters to secure a uniform flow therefrom; and to these ends it consists in the con struction and combination of parts described in the specification, illustrated in the drawings, and finally pointed out in the claims.

Although described in connection with a filter, it will be apparent that my invention is equally applicable to other apparatus which need not be herein specifically referred to.

It is well known that in filters the flow varies directly with the head and inversely with the friction, this latter including both the resistance of the layers of filtering material and that in the pipe connections. When the filter is clean, these resistances are comparatively small; but as the filtering material becomes clogged the resistance increases until the minimum effective head-namely, the differ ence between the total head and the friction is reached, which is just sulficient to force the desired quantity through the filter. At this time it becomes necessary to cleanse the filterbed, and this is done ordinarily by washing As a practically uniformfrate of discharge is desirable for the proper operation, it is customary to introduce some device which will automatically throttle the outlet when the filter is clean and reduces this throttling as it becomes clogged until at the end a free discharge is secured, and as the duration of operation between washes depends upon the total effective head it is evident that it is desirable to employ such a device as will entail the least possible loss thereof. In a type of controller commonly used to-day the loss of head is very considerable, due to the resistance offered by the valves and the pressure necessary to secure the required discharge through a central or inside pipe of comparatively small diameter and provided with a form of weir which ofi'ers only a reduced orifice for the passage of the liquid. In order to overcome the several disadvantages noted, I have devised the mentioned valves D and E. that the float F, the weir B, and the valves D present form of apparatus, wherein the weir is so arranged as to cause the external discharge of theliquid instead of an internal discharge, and I am thus enabled to increase materially the size of the weir and of the outlet for the liquid, and thereby to reduce the resistance. vices for the weir and for throttling the supply in connection therewith.

Referring to the drawings, Figure 1 is a top view, partly in horizontal section on the line 1 1 of Fig.2, of one form of my improved device; and Fig. 2 is a vertical sectional view thereof, taken substantially on the line 22 of Fig. 1.

The controlling device comprises a cylin-' drical oute'r vessel or receptacle A, which, however, may be of any suitable or desired material and in any convenient form. Within the vessel A an'interior chamber J- is provided, which is separated from the chamber A by the partitionsL and M and connects directly with the inlet-pipe J, through which the filtered water or otherliquid is introduced.

The chamber J communicates with the inte rior of the vessel A by the annular ports H and K, formed, respectively, in the partitions L and M. These ports or openings H and K are automatically controlled by correspondingly-shaped valves or d-iaphragms D and E,

so as to vary the flow of the liquid from the pipe J and chamber J i to the interior-of the vessel A.

. At the upper portion of andwithin the ves-. sel A an annular weir B is provided and over which the. liquid flows, so as to pass externally to the discharge-conduits.

of a-limited amount of vertical motion therein.

- A suitably-guided float-stem C carries a float F and has projecting arms Gr G, upon which the weir B is mounted. The arms G G are provided with depending rods G G", which are attached to and support the previously It is to be noted and E are thus connected, so as to move vertically together.

The operation is substantially as follows: When the water or other liquid is admitted through the pipe J it flows into the chamber J and thence through the ports H and K into the. body of the vessel A, in which it rises until it overflows the weir B. The water continues to rise until the quantity overflowing the weir B is equal to that admitted through I have also provided regulating de- The annular weir B fits within thevessel A and is capableof the movable parts connected thereto.

altered and their number may be increased or the ports. The float F is set in such relation to the Weir B that when this quantity is being discharged the float will be submerged to a point just suificient to balance the weigllit f then the amount admitted through the ports H and K is greater than desired, the level of the Water within the vessel A will cause the float F to rise, and with it the weir B and the valves D and E. As the valves D and E rise they close or partially close the ports H and K, and thereby automatically throttle the supply, and as the Weir B also rises with the float-F there will of course be no increase in the quantity of water discharged thereover. When, due to the lossof head in the filter or forother reasons, the supply of water through the pipe J is reduced, the quantity passing through the ports Hand K will similarly decrease, and the float F and the connected parts will falluntil equilibrium is again restored.

It is obvious that many changes may be made in the construction and arrangement of the parts illustrated and described without departing from the spirit of my invention and that other applications of the principles involved are similarly possible. Thus, for instance, the vessel or receptacle A and the Weir B may be of any shape or size. the position or shape of the ports H and K may be decreased at will, provided always that the valves D and E are similarly changed so as to cooperate therewith, and any suitable form of valve may be substituted for that herein l shown.

I am aware that it is old in the art to em ploy a float to control the inlet-valves and also to govern the position of an outlet-weir, which weir, however, is of the central or inside type and requires considerable pressure to cause the passageof the liquid thercthrough. I believe myself to be the first to use a weir in this connection which permits the external discharge of the liquid, thus enabling the employment of a weir of materially greater diameter and effecting a much larger discharge therefrom and at the same time decreasing the head necessary therefor.

Having thus described my invention, its construction, and mode of operation, what I claim, and desire to secure by Letters Patent of the United States, is as follows:

1. In a controlling devic of the character described, the combination of a regulatingweir constructed to permit the external discharge of the liquid thereover, means for throttlingthe supply of liquid, and auton'iatic means whereby the weir and the said throttling means are simultaneously adjusted.

2. In a controlling device of the character described, the combination of a regulatingweir constructed to permit the external discharge of the liquid thereover. means for throttling the supply of liquid, and a lloat whereby the weir and the said throttling means are simultaneously adjusted.

In witness whereof lhave signed my name to this specification in the presence of two attestmg witnesses.

CllAlllillS lillS'llllt lAllilllllilll). In presence of H. L. DoYLn, JAMES P. J. Momus. 

